icon description
triangle A page about basic trigonometry and triangles.

Triangle

{% embed url="https://www.geogebra.org/classic/v3BXk2tn" %} Triangle {% endembed %}

Formulas and their proofs

The area of a square is as s*s. A square can be split in half into 2 right triangles. This means the area of a triangle is half that then a rectangle or square of the dimensions. Thus the formula for the area of a triangle is

12hlt \frac{1}{2}hlt

h is the height and w is the width / length.

Angles

We know that, by definition, a straight line is 180 degrees.

Halve of that would be the shape formed by the angle known as a right angle. An angle with a 90 degree measurement. Let's create a right triangle.